Mild Steel Sheet Metal Bend Radius Chart

An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format.

Mild steel sheet metal bend radius chart.

Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried. Let s say i have a 2 mm thick sheet and i want to bend it. Table 1 preferred recommended 90 degree bend radii for various sheet metals. Although it is an option for calculating a bend in some cad programs such as solid works it is not often referred to in the actual manufacturing process since.

It is possible to choose other bends if you require but additional lead time and tooling charges may apply. Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. The main advantage of the air bending process is that it is versatile and not entirely dependent upon the tooling. To use the tables below.

In air bending process the tooling only touches the sheet metal along the bend radius and the two drawn radii. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. In the example above it is indicated by a dashed blue line.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. In the example above it is indicated by a dashed blue line. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing. Specifing a bend radius from here will help prevent hair line cracks. Refer to table s for your choice of material. The minimum bend radius data shown in these charts is measured to the inside of the bend.

The same bend result can be made with several combinations of upper and lower tooling. The bend allowance is the amount of the neutral axis that bends. Bend forming 0 l a b 0 43t t thickness deduction 0 43t. To keep it simple i also use a 2 mm inside radius.

L unfold length a outside size b outside size k k factor none 90 bend unfold according to the neutral layer the distance from neutral to sheet inner side is t 3 inner r can refer to the above chart. Recommended minimum bend radii for steel and aluminum.